Martin: So you eavesdropped, huh?
Frasier: No.
Martin: Well, a person's having a private conversation. You stop and listen, that's eavesdropping!
Frasier: Dad, it was completely by accident. I understand why you'd be upset, but please don't shoot the messenger.
Martin: Well, the messenger's got it coming if he's a dirty little eavesdropper! You walk into a private conversation, you make your presence known by some subtle way. You can-can clear your throat- [clears throat] you can make a noise- [hits the table]
Frasier: Dad, please!
Martin: [gets up] You know, just because people call in for your precious pearls of wisdom on the radio, it doesn't give you a free pass to get into everybody's business! Now I know why you're always saying, "I'm listening", because you always are!